I am applying at the moment for an unpaid internship and I have a bumpy resumé:
At high-school I was not good at maths and we were not educated in STEM fields except of biology. So I started to study languages which I didn't like, I switched over to cultural science and also didn't like it. Ending up with the conclusion that I want to learn "solid" science I taught myself high school and college mathematics - so I switched over to physics, I passed a few courses with good grades, I have made two internships and received excellent job references from the companies via letter.
But I wasn't happy with physics either - I was happy to finally be in the STEM Field but physics was a little too abstract and I wanted to work in a more practical field. You can call me undecided at this point, but I see it more like that I was never in touch with STEM field and brought myself here by fixing my lack of knowledge on my own. So having all this opportunities in STEM field was something opening up to me lately in life, while others have this taught in school. I didn't want to switch subjects again because I was afraid to do so. After a longer period of time at which I performed poorly and became more and more unhappy at physics - I switched over to mechanical engineering at which I am totally happy.
So now I have to apply for an internship and I already received some offers. They now want to have all the documents and I am afraid that my resumé seems like a certificate of indecision rather than an explainable longer way of orientation.
I admit that staying that long in physics because of fear to switch again was a mistake. But nonetheless I am happy at what I am doing right now and I want to follow this path and do the necessary qualifications as this internship.
So this is the point I am honestly asking for help on how to explain that resumé when I am handing it out to companies.